I didn't get to meet Yumi, but we had no problem communicating. Everything was easy, comfortable, clean, and perfect. I have already booked a 2nd stay!
See the photos and you'll get a good view of the apartment. The pool and gym are nice. There is a daily market (with food for lunch only) next to the 7-Eleven on the weekdays, with rotating stalls. It is a quick walk to Sukhumvit Soi 11 if you go down Petchaburi Soi 36 (adjacent to the condo), walk along the klong, and cross over the bridge.
There is also a tuk-tuk that can take you to the closest BTS or MRT station. I found it really easy to get around.